Roller-drill.



HUGHES.

BULLE-R DRILL.

APPLIGATIOS ruin LEG. 27. 1910.

` Patented Nmz 28, 19141 n llil.

ROLLER-DRILL.

1,01 oaoo.

Specification of Letters Patent.

Patented Nov. 28, 1911.

Original application tiled July 15, 1909, Serial No. 507,678. Divided and this application led December 27,

Serial N0. 599,526.

Pw it known that l', llonzirm R. lltones, a citizen-of the United States, residingr at Houston. 'lr-vas. have invented a certain new and useful improvement in Rollerl)rill.-. ol" which me i'ollinving;y is a full. clear, and exart deseriptioin Su-h as will enable other; skilled in the art to which it appertains` to malte and use the suine.

.This invention relates to roller boring drills, and is a divisional ot' niv-pending applieation Serial No. 5016278, tiled July 1.3, nies, e

One obje-it (it in v invention is to provide a drill having.: aV rfller spindle that, is conipos'ed el a plurality of separate parts which detaeliablxv'eonneeied io the. head of the drill.

Another object is lo provide a drill having,f aroller spindle of the saine `general type as that described in nrv parent application above referred to, but which is so eonstrueted that a one-piece rin;r van be usedv for locking the roller on the spindle.

Figure i of the drawings. is a vertical seetiorall view illustrating a portion of a drill Cointrin-tial in accordance with my invention; and Fig. 2 is a similar view illus tratine' a modified torni ol' zur im ention.

Referring to Fig. l of the drawings, A designates part of the head of the drill. and B designates an approximately trasto- Conieal-shaped cutting roller that is mounted on said head. The spindle on whieh said roller is mounted consists of two portions l and Q, both of whit-h are`detaehably Conf 'nec ed to the head of the drill. rlhe portion l forms the outer end et the spindle, and 'is provided with an externally sereinthreaded shank la thatf's in an internally screw-threaded annular-shaped flange on the head, and the portion 2 which forms the inner end of the spindle` is substantiallyv ring-shaped. and is provided with internal screw-threads that e-iperate with external screw-threads on said annular flange 3. The end portion l of the spindle is, approximately trusto-eonieal-shapeel, and the outer surface or bearingr surt'aee ol' the inner portion i2 oi' the spindle is substantiallyY coneshaped and of the saine angnlarity as the bearing surface. of the, frusto-c0nical-shaped end portion l so ato provide a true bearing surfare for the roller l. The roller B is retained in operative posillon on the spindle by means of a onepiece locking ring l that Ets between the annular flange 3 on lthe head and the end portion l of the spindle which is undercut or grooved at 1b as shown in Fig. l .so as to receive the ring;V l, said locking ring l beingr provided with e.\:tf.".'nal serew-tlneads that eoperate with serew-threads on the spindle socket or bore formed in the roller. If desied. a washer 5 can he arranged betivetn the head and the removable inner end portieri i2 of the spindle so as .to prevent `said parts from wearingr out quit-klv..

ln asseinhlinj T the partev above described l first arrange the washer 5 in operative position. then serew the removable portion 2 onto the annular flange 3 on the head, and then arrange the locking-l ring fl in the groove or undercut part of the end portion i et die spindle and serew said end portion l into the annular flange 3 o'n the head. The final operation is to screw the roller` B onto the loelting ringr 4, and in order that. .said ring may be held stationariY while the. roller is beine' screwed onto saine I have ln'ovided the head with a hole. or passage- 'ay (S through which a pin`or other suitable devia-e (not shown) can be inserted so as to engage the looking' ring 4 which is preferablv provided with a recess or hole C? for receiving' the end of said pin or tool. After the roller has been screwed onto the ring 4 the pin-or deviee which is used to hold said ring stationary, is removed So as to perinit the ring to rotate with the roller.

With a drill of the construction above des'eribel it. is not necessary to discard the head when the. spindles; heeonie worn heeause eaeh spindle is made up of a plurality of separate parts that are detaeliably connected to the head.I and consequently, the rollers. oi a drill ot the eonstruetion above referred to can be kept trned up with very little expense.

ln Fig. :2 I have illustrated a slightly modified form of my invention in which the end portion 1C- of the spindle is eylint'lriealshaped instead of tapered or conical-shaped :is in the construction `shown in Fig. l. the removableinner end portion Q0 of the spindle also being Cyliudrieal-sliaped instead of tapered. In other respects, the drill illustrated in Fig. :2 is substantially the saine as thaty shown in Fig. 1 as the outer end portion l0 oi' thespindle. is provided with a shank that is screwed into the annn l lar-shaped flange 3 on the head` and the inner end portion "30 of the spindle is also screwed onto said annular flange. ,A

Having thus described my invention, what I claim as new and desire to Secure by Letters Patent is:

1. A roller drill having a head provided with a spindle that consists of a pluraljvof separate parts that are deachahly Connected to the head, and a roller mounted on =.aid Sfindle.

2. A drill comprising a head', a removable spindle portion detaohahlv con ee ed to said head, a separate removable spindle. pertron connected to said head and arranged adwcent the inner end of the spindle portion tirst referred to` and a roller mounted on said spindle portions.

3. A drill having a head provided with a Suhstantiallv annular-Shaped flange, an( a roller-supportiw Spindle comprising a n that ifa Screwed into said flange. and a i; rate part that is screwed onto said flange so fig i() Slll'l'll'llt'l SUTIP.

4. A roller boring drill having` provided with a salistantially annllarshaped flange, a Spindle portion hai/imr a Screw-threaded shank that projects into said flange, a substantially ring-Shaped member detaehahly connected to Said flange and cooperating .vith Said .fpindle portion to forni a hearingr Surface, and a roller mounted on .Caid hea ring sart'aee.

5. A boring drill comprising a head provided with a :Cooker`r a removable. Si: dl@ portion provided with a shanlr that' pr ets into smid sorliet. a roller mounted on aid Spindle portion, and a locking;f ring Screwed into said roller and'lying hetiveen said fread and spindle portion for retaining said relier in position.

(l. A roller boring drill, comprising a head provided with a socket, a. removable rollensupporting memher provided with a shank that projects into said socket, a enepiece lookin;` ring loosel \Y mounted on .Said member', and a roller secured toiaid ring so that it will rotate with Same.

7. A lroller boring drill, comprising a iy head provided with an internallv1 Screwvided vvith an internal hore, a one-piece looting ring arranged inside of said here.,Y

and a supporting device for Said roller provided with a shank that projects into said Socket and also having an enlarged end por- ,tion that laps over the looking ring on the roller.

9. In a drill, a head provided with a removahle member that has a tapered bearing surface, a roller supporting,r device detach ably connected to said head, and a roller rol also an externally screw# tatahly mounted on said device and sur- Y roundingfsaid removable hearing Surface.

1 0 .A Arm romand with n 1mm z .aan ivhic.. a socket is formed, a ring-shaped member detachahly connected to said head to form a removable bearing surface, a rolleisupporting device having'a threaded portion that projects into the socket in said head, and a roller mounted on said device and surrounding said hearing surface.

11. A roller boring' drill comprising a head, a spindle on said head eomprisinrcT two separate parts that are detachahly connected to the head, said parts being spaced awajtr from each other, a roller mounted on said spindle, and means on said roller projecting into the space between the parts of said spindie so as to prevent the roller from moving longitudinally ofthe spindle.

ln testimonyY whereof I hereunto. atlix my Signature in the presence of two Witnesses, this 9th day ol' DecemberJ 1910.

O. C. m), Jr., I Geo. H, PnUTnn. 

